From 292dc6c50107a5bef1084c53c36598dde177a116 Mon Sep 17 00:00:00 2001 From: Liu Gang Date: Thu, 8 Mar 2012 00:33:18 +0000 Subject: powerpc/corenet_ds: Slave module for boot from SRIO For the powerpc processors with SRIO interface, boot location can be configured from SRIO1 or SRIO2 by RCW. The processor booting from SRIO can do without flash for u-boot image. The image can be fetched from another processor's memory space by SRIO link connected between them. The processor boots from SRIO is slave, the processor boots from normal flash memory space and can help slave to boot from its memory space is master. They are different environments and requirements: master: 1. NOR flash for its own u-boot image, ucode and ENV space. 2. Slave's u-boot image in master NOR flash. 3. Normally boot from local NOR flash. 4. Configure SRIO switch system if needed. slave: 1. Just has EEPROM for RCW. No flash for u-boot image, ucode and ENV. 2. Boot location should be set to SRIO1 or SRIO2 by RCW. 3. RCW should configure the SerDes, SRIO interfaces correctly. 4. Slave must be powered on after master's boot. 5. Must define CONFIG_SYS_QE_FMAN_FW_IN_REMOTE because of no ucode locally. For the slave module, need to finish these processes: 1. Set the boot location to SRIO1 or SRIO2 by RCW. 2. Set a specific TLB entry for the boot process. 3. Set a LAW entry with the TargetID SRIO1 or SRIO2 for the boot. 4. Slave's u-boot image should be generated specifically by make xxxx_SRIOBOOT_SLAVE_config. This will set SYS_TEXT_BASE=0xFFF80000 and other configurations. Signed-off-by: Liu Gang Signed-off-by: Shaohui Xie --- README | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'README') diff --git a/README b/README index 43074cf..da15105 100644 --- a/README +++ b/README @@ -3462,6 +3462,12 @@ within that device. Specifies that QE/FMAN firmware is located on the primary SPI device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. +- CONFIG_SYS_QE_FMAN_FW_IN_REMOTE + Specifies that QE/FMAN firmware is located in the remote (master) + memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which + can be mapped from slave TLB->slave LAW->slave SRIO outbound window + ->master inbound window->master LAW->the ucode address in master's + NOR flash. Building the Software: ====================== -- cgit v1.1 From 0a85a9e70593a9cd90fbbbdaad8443e31a9dd5a3 Mon Sep 17 00:00:00 2001 From: Liu Gang Date: Thu, 8 Mar 2012 00:33:20 +0000 Subject: powerpc/corenet_ds: Slave reads ENV from master when boot from SRIO When boot from SRIO, slave's ENV can be stored in master's memory space, then slave can fetch the ENV through SRIO interface. NOTE: Because the slave can not erase, write master's NOR flash by SRIO interface, so it can not modify the ENV parameters stored in master's NOR flash using "saveenv" or other commands. Master needs to: 1. Put the slave's ENV into it's own memory space. 2. Set an inbound SRIO window covered slave's ENV stored in master's memory space. Slave needs to: 1. Set a specific TLB entry in order to fetch ucode and ENV from master. 2. Set a LAW entry with the TargetID SRIO1 or SRIO2 for ucode and ENV. Signed-off-by: Liu Gang Signed-off-by: Shaohui Xie --- README | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'README') diff --git a/README b/README index da15105..a0536a4 100644 --- a/README +++ b/README @@ -3026,6 +3026,24 @@ to save the current settings. environment area within the total memory of your DataFlash placed at the specified address. +- CONFIG_ENV_IS_IN_REMOTE: + + Define this if you have a remote memory space which you + want to use for the local device's environment. + + - CONFIG_ENV_ADDR: + - CONFIG_ENV_SIZE: + + These two #defines specify the address and size of the + environment area within the remote memory space. The + local device can get the environment from remote memory + space by SRIO or other links. + +BE CAREFUL! For some special cases, the local device can not use +"saveenv" command. For example, the local device will get the +environment stored in a remote NOR flash by SRIO link, but it can +not erase, write this NOR flash by SRIO interface. + - CONFIG_ENV_IS_IN_NAND: Define this if you have a NAND device which you want to use -- cgit v1.1